The urban exploration site mechanized has a lovely photo post about a secret forest sanctuary.
A few years ago, in dense woodland a few miles from my home, I discovered a caravan. Encircled by trees and undergrowth, and over a mile from the nearest road, its presence was utterly incongruous, with few clues as to how or why it had come to rest at this point. For almost a year, I kept my distance, fearful it was inhabited by a hermit and that I would be chased away if I ventured too close. Eventually, I investigated further and discovered that it was empty; its furnishings intact, but no sign of human inhabitants.
That's only the beginning of the story. After many visits, he discover there was another visitor to the caravan, and they begin leaving notes for each other. Link -via Metafilter